
创新力课堂
在未来社会,与孩子一起玩科技,与家长一起探讨孩子的教育问题。
16
66期
Pencil lead, primarily composed of graphite and clay, is a conductive material due to its inherent electrical conductivity. Graphite content affects the conductivity: higher in darker leads, making thicker and shorter ones more likely to conduct electricity. Hardness and color also play a role, with less graphite content in lighter colors resulting in lower conductivity.


88期

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